diff options
| author | Julia Lawall <julia@diku.dk> | 2010-08-31 15:48:56 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-09-02 15:28:49 (GMT) |
| commit | 880b8ffd45bf46f783b8b0d009487d89fd37b608 (patch) | |
| tree | 225085f161842344c3152838db6cbd28af035334 /sound/soc/fsl | |
| parent | 3ba31051f1bbdad3c6b597903f7a2ee3b00e001e (diff) | |
| download | linux-fsl-qoriq-880b8ffd45bf46f783b8b0d009487d89fd37b608.tar.xz | |
ASoC: pl022_ds.c: Add of_node_put to avoid memory leak
Add a call to of_node_put in the error handling code following a call to
of_parse_phandle.
This patch also moves the existing call to of_node_put tothe end of the
error handling code, to make it possible to jump to of_node_put without
doing the other cleanup operations. These appear to be disjoint
operations, so the ordering doesn't matter.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
local idexpression x;
expression E,E1,E2;
statement S;
@@
*x =
(of_find_node_by_path
|of_find_node_by_name
|of_find_node_by_phandle
|of_get_parent
|of_get_next_parent
|of_get_next_child
|of_find_compatible_node
|of_match_node
|of_find_node_by_type
|of_find_node_with_property
|of_find_matching_node
|of_parse_phandle
)(...);
...
if (x == NULL) S
<... when != x = E
*if (...) {
... when != of_node_put(x)
when != if (...) { ... of_node_put(x); ... }
(
return <+...x...+>;
|
* return ...;
)
}
...>
(
E2 = x;
|
of_node_put(x);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Timur Tabi <timur@freescale.com>
Acked-by: Liam Girdwood <lrg@slimlogic.uo.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/fsl')
| -rw-r--r-- | sound/soc/fsl/p1022_ds.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/sound/soc/fsl/p1022_ds.c b/sound/soc/fsl/p1022_ds.c index f8176e8..63b9eaa 100644 --- a/sound/soc/fsl/p1022_ds.c +++ b/sound/soc/fsl/p1022_ds.c @@ -346,8 +346,10 @@ static int p1022_ds_probe(struct platform_device *pdev) } mdata = kzalloc(sizeof(struct machine_data), GFP_KERNEL); - if (!mdata) - return -ENOMEM; + if (!mdata) { + ret = -ENOMEM; + goto error_put; + } mdata->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev); mdata->dai[0].ops = &p1022_ds_ops; @@ -502,13 +504,12 @@ static int p1022_ds_probe(struct platform_device *pdev) return 0; error: - of_node_put(codec_np); - if (sound_device) platform_device_unregister(sound_device); kfree(mdata); - +error_put: + of_node_put(codec_np); return ret; } |